US5726819A - Apparatus for erasing a recording medium - Google Patents

Apparatus for erasing a recording medium Download PDF

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Publication number
US5726819A
US5726819A US08/279,869 US27986994A US5726819A US 5726819 A US5726819 A US 5726819A US 27986994 A US27986994 A US 27986994A US 5726819 A US5726819 A US 5726819A
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US
United States
Prior art keywords
erasing
mode
switch
track
manipulating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/279,869
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English (en)
Inventor
Ryoji Kubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP26444190A external-priority patent/JPH04141801A/ja
Priority claimed from JP26443890A external-priority patent/JP3211247B2/ja
Priority claimed from JP2264439A external-priority patent/JPH04142185A/ja
Application filed by Canon Inc filed Critical Canon Inc
Priority to US08/279,869 priority Critical patent/US5726819A/en
Application granted granted Critical
Publication of US5726819A publication Critical patent/US5726819A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/21—Intermediate information storage
    • H04N1/2104—Intermediate information storage for one or a few pictures
    • H04N1/2112—Intermediate information storage for one or a few pictures using still video cameras
    • H04N1/2125—Display of information relating to the still picture recording
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/21—Intermediate information storage
    • H04N1/2104—Intermediate information storage for one or a few pictures
    • H04N1/2112—Intermediate information storage for one or a few pictures using still video cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/21—Intermediate information storage
    • H04N1/2104—Intermediate information storage for one or a few pictures
    • H04N1/2112—Intermediate information storage for one or a few pictures using still video cameras
    • H04N1/2129—Recording in, or reproducing from, a specific memory area or areas, or recording or reproducing at a specific moment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/21—Intermediate information storage
    • H04N1/2104—Intermediate information storage for one or a few pictures
    • H04N1/2112—Intermediate information storage for one or a few pictures using still video cameras
    • H04N1/215—Recording a sequence of still pictures, e.g. burst mode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2101/00—Still video cameras
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S358/00—Facsimile and static presentation processing
    • Y10S358/906—Hand-held camera with recorder in a single unit

Definitions

  • the present invention relates to an erasing apparatus, and more particularly to one for erasing an image recorded on a recording medium such as a magnetic disk or a solid-state memory.
  • the recording format of the still video floppy disk is defined by the still video committee.
  • the still video floppy disk has 50 recording an tracks, from the outermost 1st track to the innermost 50th track, each capable of recording image signal of a field. Image recording of a frame can be achieved by two adjacent tracks.
  • the recording format is defined for the ID information associated with the recorded still image, such as date, time, track number, field/frame identification information and user code.
  • an electronic still camera capable of digital recording of an image utilizing a solid-state memory such as a semiconductor memory, as the recording medium.
  • the conventional apparatus For erasing the records on all the tracks of such still video floppy disk, the conventional apparatus is equipped with an exclusive switch for all-track erasure, and the all-track erasing operation is started and stopped by such an exclusive switch.
  • the all-track erasing mode is cancelled after the erasing operation of a track currently under erasure is completed.
  • the operator feels uneasiness that the actuation of cancelling switch may not have been accepted.
  • the power supply therefor is continued even after the erasure of all the tracks, and involves unnecessary power consumption such as the motor for rotating the recording medium still being in rotation. Also, in case where the recording medium is composed of a semiconductor memory, the power consumption is wasted by continuation of power supply to said semiconductor memory.
  • the conventional electronic still camera is often provided, in addition to the erasing mode for erasing a designated track of the recording medium, with an all-track erasing mode for erasing all the tracks, and an exclusive switch is provided for effecting and cancelling such all-track erasure.
  • An object of the present invention is to provide an erasing apparatus capable of collectively or individually resolving the drawbacks mentioned above.
  • Another object of the present invention is to provide an erasing apparatus with improved operability.
  • Still another object of the present invention is to provide an erasing apparatus with reduced electric power consumption.
  • Still another object of the present invention is to provide an erasing apparatus capable of preventing erroneous operations.
  • an image record/reproducing apparatus provided with an all-track erasing mode for erasing all the records on a recording medium, in which said erasure of all the records is achieved by simultaneous actuations of plural operation members to be used in the recording mode, whereby the erroneous execution of the all-record erasing mode can be prevented and the number of operation members can be reduced.
  • an apparatus equipped with two display members, both of which are in a display state during the all-record erasing mode, but one of which is shifted to a non-display state in response to the cancellation of the all-record erasing mode and the other of which is also shifted to a non-display state at the completion of the erasing operation currently in progress at the cancellation of the all-record erasing mode, whereby the acceptance of cancellation of the all-record erasing mode can be confirmed even in the course of an erasing operation.
  • FIG. 1 is a block diagram of an embodiment of the present invention
  • FIG. 2 is a view showing the contents of display of a display unit 36;
  • FIG. 3 consisting of FIGS. 3A-3B are a flow chart of an operational sequence for recording and display
  • FIG. 4 consisting of FIGS. 4A-4B are a flow chart of an operational sequence for reproduction and erasure
  • FIGS. 5, 6, 7, 8 and 9 are views showing examples of display by the display unit 36;
  • FIG. 10 is a timing chart of an interval phototaking mode
  • FIG. 11 is an external view of the apparatus.
  • FIG. 1 is a block diagram of an embodiment of the present invention, wherein shown are a phototaking lens 10; a mechanical shutter 12; a driving circuit 14 for the shutter 12; an image pickup device 16; a process circuit 18 for forming a luminance signal and color difference signals from the output of the image pickup device 16; a recording circuit 20 for applying recording processes such as modulation on the luminance and color difference signals released from the process circuit 18; a selector switch 22 for selecting recording, erasure or reproduction; a video floppy disk 24 constituting the recording medium; a motor 26 for rotating the floppy disk 24; a magnetic head 28; an erasing circuit 30 for generating an erasing signal; a reproducing circuit 32 for applying reproduction process such as demodulation on the signal reproduced by the magnetic head 28 thereby generating a video signal; and a video output terminal 34.
  • a liquid crystal display device 36 for displaying the status of the system and various data; a system control circuit 38 for controlling the entire system; and a group of switches 40 for entering instructions to the control circuit 38.
  • a first release switch 42 to be closed by a first stroke of the shutter releasing operation, thereby initiating preparation for phototaking
  • a second release switch 44 to be closed by a second stroke, succeeding to the first stroke, of the shutter releasing operation, thereby initiating the phototaking operation
  • the detailed functions and additional functions of the said switches will be explained later.
  • a motor driving circuit 70 for driving the motor 26, stops said motor 26 in the shut-off state.
  • the system control circuit 38 is provided therein with a clock circuit and a back-up memory, and there are also provided a battery for the back-up memory, and a main battery for powering various circuits other than the control circuit 38.
  • FIG. 11 is an external view of the apparatus of the embodiment, wherein numbers correspond to those in FIG. 1.
  • FIG. 2 shows display elements in the liquid crystal display unit 36.
  • An element 100 is displayed when the light emission of the flash unit is forcedly inhibited, and is turned off when the light emission is automatically controlled according to the intensity of external illumination.
  • An element 102 is displayed in the normal phototaking mode.
  • An element 104 is displayed in the interval phototaking mode or in the interval reproduction mode.
  • An element 106 is displayed in the self-timer phototaking mode.
  • An element 108 is displayed in the continuous phototaking mode.
  • Elements 110 are displayed for distinguishing date, wherein Y, M and D respectively stand for year, month and day.
  • An element 112 flashes when the battery for the clock needs replacement.
  • An element 114 flashes when the main battery needs replacement.
  • An element 116 is displayed in the erasing mode.
  • An element 118 is displayed together with the element 116 in the all-track erasing mode.
  • Elements 120 are displayed for distinguishing time, wherein H and M respectively stand for hour and minute.
  • Elements 122 display characters and numerals, for example for the date, time or track number.
  • the circuit shown in FIG. 1 functions in the following manner.
  • the shutter 12 is activated by the shutter releasing operation, and the electrical signal obtained by the image pickup device 16 is converted by the process circuit 18 into luminance and color difference signals.
  • the recording circuit 20 applies a recording process such as frequency modulation on the output signals of the process circuit 18, and the obtained signal is supplied through the switch 22 to the magnetic head 28 and recorded on the magnetic disk 24.
  • the output of the magnetic head 28 is supplied through the switch 22 to the reproduction circuit 32, which effects a reproduction process such as demodulation and releases the reproduced image signal to the output terminal 34.
  • the recording mode is assumed by the actuation of the recording switch 46, whereupon the display unit 36 displays a symbol "S" 102 indicating the normal phototaking mode (S100) as shown in FIG. 5(1), and also displays a track number by the elements 122.
  • the switch 44 is turned on (S104) in this state, the image is recorded on the magnetic disk 24 as explained above (S1). If the switch 44 remains turned on after recording, the recorded image is reproduced as explained above (S2, S3). In this reproduction, the reproduced video signal, overlapped with the track number of the track recorded in the step S1 is released from the output terminal 34.
  • the switch 44 is turned off, the magnetic head 28 moves to a next track (S4), and the display unit 36 displays the track number after shifting.
  • the mode switch 54 When the mode switch 54 is actuated in this state, the operating mode is shifted from the normal phototaking mode to the continuous phototaking mode (S101), whereupon the display unit 36 displays a symbol "C" 108 indicating the continuous phototaking mode as shown in FIG. 5(2), and also displays a track number for recording, by the elements 122.
  • the switch 44 When the switch 44 is turned on in this state (S105), the obtained images are continuously recorded on the magnetic disk 24 while the switch 44 is turned on (S5, S6, S7).
  • the mode switch 54 is actuated again, the operating mode is shifted from the continuous phototaking mode to the self-timer phototaking mode (S101), whereupon the display unit 36 displays a timer symbol 106, indicating the self-timer phototaking mode, as shown in FIG. 5(3), and also displays a track number for recording, by the elements 122. If the switch 44 is turned on in this state (S106), the motor 26 is activated and a light-emitting device for self-timer (not shown) flashes with a frequency of 8 Hz for 2 seconds (S8). Then recording is executed (S9) and the magnetic head is shifted to a next track (S10).
  • the mode switch 54 When the mode switch 54 is actuated again, it assumed to be the interval phototaking mode (S103), whereupon the display unit 36 displays a symbol "INT" 104 indicating the interval phototaking mode, as shown in FIG. 6(1), and also displays “0 M ", indicating that the interval of phototakings is not set, by means of the elements 122 and 120. Then said interval is set within a range of 1-99 minutes, by means of the up switch 50 and the down switch 52.
  • the switch 44 When the switch 44 is subsequently turned on, the recording and display operations are conducted as explained above, then the magnetic head 28 is shifted to a next recording track, and the display unit 36 flashes the symbol "INT" 104 as shown in FIG. 6(2).
  • interval timer S11
  • the motor 26 is activated 2 seconds before the preset interval.
  • the light-emitting device (not shown) for self-timer flashes at a frequency of 8 Hz for 2 seconds, and the recording (S12) and the track shifting (S13) are conducted.
  • the steps S11, S12 and S13 are repeated.
  • the display unit 36 displays the interval of phototaking, as shown in FIG. 6 (3).
  • FIG. 10 is a timing chart in case the switch 44 is turned on after two automatic phototaking operations in the interval phototaking mode.
  • the interval phototaking mode can be cancelled by selecting the normal phototaking mode with the mode switch 54, or by adopting the normal phototaking mode by the actuation of the recording switch 46 after locking or image reproduction, or by adopting the normal phototaking mode by removing and re-loading the magnetic disk.
  • the switch 44 is turned on while the interval time is not yet determined (display of "0 M ")
  • the recording and display are conducted as explained above, and there is assumed the normal phototaking mode, whereupon the symbol "S" 102 is displayed.
  • the BLC switch 56 is actuated simultaneously with the switch 44, the obtained image is recorded with correction for back lighting. Also, if the flash switch 60 is turned on, the flash emits light during the phototaking operation.
  • FIG. 4 For explaining the operations and displays in the reproducing and erasing operations.
  • the reproduction mode in which reproduced is an image which has been recorded immediately before or which was recorded in a designated track (S20).
  • recorded ID data such as of data and time, are released from the output terminal 34 in the the form of a character signal, overlapped with the reproduced video signal, in response to the actuation of the data switch 58.
  • the track number, data and time are displayed and erased cyclically in response to the actuations of the data switch 58.
  • the reproduced track can be varied by the up switch 50 and the down switch 52.
  • the display unit 36 displays a symbol "INT" 104 indicating the interval reproduction mode, as shown in FIG. 7(2), and also displays the track number in reproduction, by the segments 122.
  • the magnetic head is shifted to a next upper recorded track (S22) and said track is reproduced (S23).
  • the steps S21, S22 and S23 are cyclically repeated until the interval reproduction mode. If there are no upper recorded tracks, the recorded tracks are reproduced in succession from the first track. Consequently, if there is only one recorded track, the track alone is reproduced. Also, if there is no recorded track, the display of the "INT" symbol 104 is erased and the interval reproduction mode is cancelled.
  • the interval reproduction mode can be cancelled either by the actuation of the flash switch 60, or by the turning-on of the switch 42, or by the actuation of the reproduction switch 48 again after locking or shifting to the recording mode, or by the actuation of the mode switch 54.
  • the reproduction may be re-started by turning on the switch 42 (S37), or by actuating the reproduction switch 48 again after locking or shifting to the recording mode.
  • the erasing mode is assumed, instead, by simultaneously actuating a plurality of switches used only in the recording mode, in the course of the reproduction mode. More specifically, by simultaneous actuating the switches 42, 44 and the mode switch 54 in the course of the reproduction operation (S35), the reproduced image is muted (S40) and the track under reproduction is erased (S25). If the switches continue to be actuated (S26), the magnetic head 28 is shifted to a next inner track (S27) and said track is erased (S25). During these operations, the display unit 36 provides a display as shown in FIG. 7(3) when the mode switch 54 is actuated, and the muted reproduced image is in succession released from the terminal 34 and displayed on a monitor (not shown).
  • the all-track erasing mode is assumed by the simultaneous actuation of the switches 42, 44, mode switch 54 and BLC switch 56 (S36).
  • the magnetic head 28 is shifted to the innermost 50th track (S28), and the 50th to 1st tracks are erased in succession (S29, S30, S31).
  • the power supply is turned off to enter the shut-off state (S32).
  • the switches 42, 44, mode switch 54 and BLC switch 56 are once simultaneously actuated, they may be released.
  • the display unit 36 provides a display as shown in FIG. 7(4) when the switches are simultaneously actuated.
  • the all-track erasing mode can be cancelled by the actuation of the switch 42 (S44) between the steps S42 and S43, or by the actuation of the reproduction switch 48 again after locking or shifting to the recording mode.
  • the switch 42 is actuated in the course of erasure of a track, the display of the "ALL" symbol 118 is erased to reach a display state shown in FIG. 7(3). It can thus be identified that the all-track erasing mode is cancelled.
  • the display unit 36 After the completion of erasure of the track currently under erasure, the display unit 36 provides a display shown in FIG. 7(1), and the muted reproduced image continues to be released from the terminal 34 and displayed on the monitor (not shown). Also if the switch 42 is actuated during the shift between the tracks, the display unit 36 immediately provides the display shown in FIG. 7(1).
  • a recording-proof measure may be applied to the magnetic disk 24. If the above-explained erasing operation is conducted in such a case, then the display unit 36 provides a display as shown in FIG. 8(1) or (2), and the erasure is not executed.
  • the battery symbol 114 flashes as a warning signal, and the all-track erasing operation is inhibited at the predetermined voltage.
  • the display unit 36 provides a display as shown in FIG. 8(3). However, if the predetermined voltage is reached in the course of the all-track erasing operation, the erasure is continued.
  • the display unit 36 provides a display shown in FIG. 8(4).
  • the display unit 36 displays a symbol "Y" 110, indicating year, and a corresponding number by the segments 122.
  • the display cyclically changes in the order of year, month, day, hour, minute and normal display. The current date and time can be confirmed in this manner.
  • the displayed number can be varied by the up switch 50 and the down switch 52, and one of the symbols Y, M, D, H and M flashes as shown in FIG. 9(2).
  • the normal phototaking mode is assumed when the above-explained operation is conducted during the display of the internal time (display of set interval time or unset state of interval time).
  • the display is switched to the normal state. Also, the normal display is assumed in response to the voltage drop of the main power supply, actuation of the recording switch 46 or reproducing switch 48, or loading or unloading of the magnetic disk 24.
  • the present embodiment employs the still video floppy disk as the recording medium, but there may be employed a tape-shaped medium, an optical recording medium, or a solid-state memory such as a semiconductor memory, as the recording medium.
  • the present embodiment can prevent erroneous execution of the all-track erasing mode, since the mode is executed by simultaneous actuation of a plurality of operation members which are used in the recording mode. Also the number of operation members, such as switches, can be reduced since such members are used for a plurality of purposes. Also, the use of two display members in the erasing operation allows confirmation that a cancelling operation for the all-record erasing mode is accepted, even if the cancelling operation is conducted in the course of erasure of a track.
  • the present embodiment can avoid unnecessary electric power consumption, since the power supply is automatically shut off after the erasure of all the tracks.
  • the present embodiment ensures correct timing for terminating the erasure, as the all-track erasing mode can be cancelled with a simple operation. Also the cancellation, being achievable with recording switch, does not require additional switches, thus avoiding increase in cost.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Television Signal Processing For Recording (AREA)
US08/279,869 1990-10-02 1994-07-26 Apparatus for erasing a recording medium Expired - Lifetime US5726819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/279,869 US5726819A (en) 1990-10-02 1994-07-26 Apparatus for erasing a recording medium

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2-264439 1990-10-02
JP26444190A JPH04141801A (ja) 1990-10-02 1990-10-02 消去装置
JP2-264438 1990-10-02
JP2-264441 1990-10-02
JP26443890A JP3211247B2 (ja) 1990-10-02 1990-10-02 画像記録再生装置
JP2264439A JPH04142185A (ja) 1990-10-02 1990-10-02 消去装置
US76626691A 1991-09-27 1991-09-27
US08/279,869 US5726819A (en) 1990-10-02 1994-07-26 Apparatus for erasing a recording medium

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US76626691A Continuation 1990-10-02 1991-09-27

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US5726819A true US5726819A (en) 1998-03-10

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US08/279,869 Expired - Lifetime US5726819A (en) 1990-10-02 1994-07-26 Apparatus for erasing a recording medium

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US (1) US5726819A (de)
EP (1) EP0479536B1 (de)
DE (1) DE69130821T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905528A (en) * 1995-08-23 1999-05-18 Olympus Optical Co., Ltd. Apparatus having a moving picture recording mode and a still picture recording mode and which is capable of simultaneously displaying a remaining memory capacity with respect to each of the recording modes
US6829430B1 (en) * 1998-09-02 2004-12-07 Sony Corporation Image recording apparatus
US7184081B1 (en) * 1998-09-04 2007-02-27 Fuji Photo Film Co., Ltd. Image processing apparatus which prevents a panoramic image or sequence of consecutive images from being partially lost due to accidental erasure thereof

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US4366501A (en) * 1978-04-23 1982-12-28 Canon Kabushiki Kaisha Image recording system
EP0271869A1 (de) * 1986-12-18 1988-06-22 Casio Computer Company Limited Elektronische Stehbildkamera

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JP3101279B2 (ja) * 1988-09-19 2000-10-23 キヤノン株式会社 情報信号記録再生装置
JPH02140071A (ja) * 1989-10-04 1990-05-29 Casio Comput Co Ltd 電子スチルカメラ
JPH02140077A (ja) * 1989-10-04 1990-05-29 Casio Comput Co Ltd 静止画像記録再生装置

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US4366501A (en) * 1978-04-23 1982-12-28 Canon Kabushiki Kaisha Image recording system
EP0271869A1 (de) * 1986-12-18 1988-06-22 Casio Computer Company Limited Elektronische Stehbildkamera

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Patent Abstracts of Japan, vol. 14, No. 153 (P-1026), Mar. 23, 1990.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905528A (en) * 1995-08-23 1999-05-18 Olympus Optical Co., Ltd. Apparatus having a moving picture recording mode and a still picture recording mode and which is capable of simultaneously displaying a remaining memory capacity with respect to each of the recording modes
US6829430B1 (en) * 1998-09-02 2004-12-07 Sony Corporation Image recording apparatus
US7184081B1 (en) * 1998-09-04 2007-02-27 Fuji Photo Film Co., Ltd. Image processing apparatus which prevents a panoramic image or sequence of consecutive images from being partially lost due to accidental erasure thereof

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Publication number Publication date
DE69130821T2 (de) 1999-07-29
EP0479536A2 (de) 1992-04-08
EP0479536B1 (de) 1999-01-27
EP0479536A3 (en) 1992-10-14
DE69130821D1 (de) 1999-03-11

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